Valve took to its official Left 4 Dead blog to announce that it is feeling festive, giving out Left 4 Dead 2 for free, for a limited time. Valve said the game "will be free as in, grab it now, pay no money, and it is yours to keep forever - for free!"
The only thing you have to do is go into Steam, and install it - after which, it will be in your library forever. This is a very limited time offer, with Left 4 Dead 2 only being free until December 26 at 10am Pacific / 1pm Eastern. Jump in and grab the zombie shooter now!